mirid bug vs lygus bug

mirid bug and lygus bug both are nouns.

Word	Noun	Adjective	Verb	Adverb
mirid bug	Yes	No	No	No
lygus bug	Yes	No	No	No

As nouns, lygus bug is a hyponym of mirid bug; that is, lygus bug is a word with a more specific, narrower meaning than mirid bug:

Other hyponyms of mirid bug include four-lined leaf bug, four-lined plant bug, Poecilocapsus lineatus.

mirid bug (noun)	lygus bug (noun)
a variety of leaf bug	vector of viral plant diseases